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                <p>为了区别一般书写表示的数和机器中这些编码表示的数,通常将前者称为真值,后者称为机器<br>数或机器码。类似于<code>-01110</code>、<code>+1001000</code>等就是真值。即前有<code>±</code>号，后有<code>0</code> <code>1</code>。。而机器码就是全部的 <code>0</code> <code>1</code>。</p>
<hr>
<h2 id="1-原码"><a href="#1-原码" class="headerlink" title="1. 原码"></a>1. 原码</h2><p>首先，原码没有<code>±</code>号。即<code>-01101</code> 与<code>+10010</code> 等属于真值。</p>
<p>原码是最左侧第一位作为符号位 ，0表示正数，1表示负数；其余各位等与真值相同。</p>
<p>(-3)<sub>D</sub> =(1110)<sub>原</sub> =(-110)<sub>真值</sub> </p>
<p>特别的：（0）<sub>D</sub> = (0000)<sub>原</sub>=1000<sub>原</sub> </p>
<h2 id="2-反码"><a href="#2-反码" class="headerlink" title="2. 反码"></a>2. 反码</h2><p>符号位的用法及正数的表示与“原码”相同；负数的表示是在“原码”表示的基础上，将符号位以外的各位取反。</p>
<p>特别的 “0” 。</p>
<p>（+5）<sub>D</sub>=  (0101)<sub>原</sub>=(0010)<sub>反</sub></p>
<p>（-5）<sub>D</sub>=  (1101)<sub>原</sub>=(1010)<sub>反</sub></p>
<p>  ( 0 )  <sub>D</sub>=  (0000)<sub>原</sub>=(0111)<sub>反</sub></p>
<p>​            =  (1000)<sub>原</sub>=(1111)<sub>反</sub></p>
<h2 id="3-补码"><a href="#3-补码" class="headerlink" title="3. 补码"></a>3. 补码</h2><p>​        符号位的用法及正数的表示与“原码”相同；负数的表示是在“反码”表示的基础上，通过加1来获得的。</p>
<p><u>巧的是，当原码为负时，补码即此负数对字节长所表示最大数（无符号位）取余。另，如果真值为负，则可对每一位求反得出补码。即，当真值小于零，原码与补码的各位相加，所有位皆为<code>0</code></u></p>
<p>(-3)=(1011) <sub>原</sub> (1100)<sub>反</sub>   (1101) <sub>补</sub> 。</p>
<p>( 0 )  <sub>D</sub> =  (0000)<sub>原</sub> = (0111)<sub>反</sub>  =  (1000)<sub>原</sub>=(1111)<sub>反</sub>=(0000)<sub>补</sub></p>
<p>​    等价于： -3 %16  = 13 -&gt; <code>1101</code> <sub>原码</sub></p>
<h2 id="4-移码"><a href="#4-移码" class="headerlink" title="4.移码"></a>4.移码</h2><p>移码通常用于表示浮点数的阶码，32位浮点数中阶码范围为。先抛个公式，<br>$$<br>[e]_移=2^k+e，2^k&gt;e≥-2^k,([e]_移为机器码，e为真值，k为数据长度，如此移码为八位)<br>$$<br>在同一前提、环境下，k不变，比如在32位浮点数中，k为7（因为有一位需要表示正负，同时，）。举个计算例子。</p>
<p>​            在一八位的移码标准下。(+100110)<sub>真值</sub>=2<sup>8</sup> + 100110=1 010 0110。</p>
<p>​                                                    (- 110110)<sub>真值</sub>=2<sup>8</sup> -  110110=0 100 1010。       </p>
<p>其中，最左侧为符号位。正好与其他几种码相反。</p>
<h2 id="5-ASCII-码"><a href="#5-ASCII-码" class="headerlink" title="5.  ASCII 码"></a>5.  ASCII 码</h2><h3 id="5-1-常用-ASCII-码"><a href="#5-1-常用-ASCII-码" class="headerlink" title="5.1 常用 ASCII 码"></a>5.1 常用 ASCII 码</h3><table>
<thead>
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<th align="right">DEC</th>
<th align="right">OCT</th>
<th align="right">HEX</th>
<th align="right">BIN</th>
<th align="center">缩写/符号</th>
<th align="center">HTML实体</th>
<th align="left">描述</th>
</tr>
</thead>
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<td align="right">0</td>
<td align="right">000</td>
<td align="right">00</td>
<td align="right">00000000</td>
<td align="center">NUL</td>
<td align="center">&amp;#000;</td>
<td align="left">Null char (空字符)</td>
</tr>
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<td align="right">1</td>
<td align="right">001</td>
<td align="right">01</td>
<td align="right">00000001</td>
<td align="center">SOH</td>
<td align="center">&amp;#001;</td>
<td align="left">Start of Heading (标题开始)</td>
</tr>
<tr>
<td align="right">2</td>
<td align="right">002</td>
<td align="right">02</td>
<td align="right">00000010</td>
<td align="center">STX</td>
<td align="center">&amp;#002;</td>
<td align="left">Start of Text (正文开始)</td>
</tr>
<tr>
<td align="right">3</td>
<td align="right">003</td>
<td align="right">03</td>
<td align="right">00000011</td>
<td align="center">ETX</td>
<td align="center">&amp;#003;</td>
<td align="left">End of Text (正文结束)</td>
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<td align="right">4</td>
<td align="right">004</td>
<td align="right">04</td>
<td align="right">00000100</td>
<td align="center">EOT</td>
<td align="center">&amp;#004;</td>
<td align="left">End of Transmission (传输结束)</td>
</tr>
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<td align="right">5</td>
<td align="right">005</td>
<td align="right">05</td>
<td align="right">00000101</td>
<td align="center">ENQ</td>
<td align="center">&amp;#005;</td>
<td align="left">Enquiry (请求)</td>
</tr>
<tr>
<td align="right">6</td>
<td align="right">006</td>
<td align="right">06</td>
<td align="right">00000110</td>
<td align="center">ACK</td>
<td align="center">&amp;#006;</td>
<td align="left">Acknowledgment (收到通知)</td>
</tr>
<tr>
<td align="right">7</td>
<td align="right">007</td>
<td align="right">07</td>
<td align="right">00000111</td>
<td align="center">BEL</td>
<td align="center">&amp;#007;</td>
<td align="left">Bell (响铃)</td>
</tr>
<tr>
<td align="right">8</td>
<td align="right">010</td>
<td align="right">08</td>
<td align="right">00001000</td>
<td align="center">BS</td>
<td align="center">&amp;#008;</td>
<td align="left">Back Space (退格)</td>
</tr>
<tr>
<td align="right">9</td>
<td align="right">011</td>
<td align="right">09</td>
<td align="right">00001001</td>
<td align="center">HT</td>
<td align="center">&amp;#009;</td>
<td align="left">Horizontal Tab (水平制表符)</td>
</tr>
<tr>
<td align="right">10</td>
<td align="right">012</td>
<td align="right">0A</td>
<td align="right">00001010</td>
<td align="center">LF</td>
<td align="center">&amp;#010;</td>
<td align="left">Line Feed (换行键)</td>
</tr>
<tr>
<td align="right">11</td>
<td align="right">013</td>
<td align="right">0B</td>
<td align="right">00001011</td>
<td align="center">VT</td>
<td align="center">&amp;#011;</td>
<td align="left">Vertical Tab (垂直制表符)</td>
</tr>
<tr>
<td align="right">12</td>
<td align="right">014</td>
<td align="right">0C</td>
<td align="right">00001100</td>
<td align="center">FF</td>
<td align="center">&amp;#012;</td>
<td align="left">Form Feed (换页键)</td>
</tr>
<tr>
<td align="right">13</td>
<td align="right">015</td>
<td align="right">0D</td>
<td align="right">00001101</td>
<td align="center">CR</td>
<td align="center">&amp;#013;</td>
<td align="left">Carriage Return (回车键)</td>
</tr>
<tr>
<td align="right">14</td>
<td align="right">016</td>
<td align="right">0E</td>
<td align="right">00001110</td>
<td align="center">SO</td>
<td align="center">&amp;#014;</td>
<td align="left">Shift Out / X-On (不用切换)</td>
</tr>
<tr>
<td align="right">15</td>
<td align="right">017</td>
<td align="right">0F</td>
<td align="right">00001111</td>
<td align="center">SI</td>
<td align="center">&amp;#015;</td>
<td align="left">Shift In / X-Off (启用切换)</td>
</tr>
<tr>
<td align="right">16</td>
<td align="right">020</td>
<td align="right">10</td>
<td align="right">00010000</td>
<td align="center">DLE</td>
<td align="center">&amp;#016;</td>
<td align="left">Data Line Escape (数据链路转义)</td>
</tr>
<tr>
<td align="right">17</td>
<td align="right">021</td>
<td align="right">11</td>
<td align="right">00010001</td>
<td align="center">DC1</td>
<td align="center">&amp;#017;</td>
<td align="left">Device Control 1 (设备控制1)</td>
</tr>
<tr>
<td align="right">18</td>
<td align="right">022</td>
<td align="right">12</td>
<td align="right">00010010</td>
<td align="center">DC2</td>
<td align="center">&amp;#018;</td>
<td align="left">Device Control 2 (设备控制2)</td>
</tr>
<tr>
<td align="right">19</td>
<td align="right">023</td>
<td align="right">13</td>
<td align="right">00010011</td>
<td align="center">DC3</td>
<td align="center">&amp;#019;</td>
<td align="left">Device Control 3 (设备控制3)</td>
</tr>
<tr>
<td align="right">20</td>
<td align="right">024</td>
<td align="right">14</td>
<td align="right">00010100</td>
<td align="center">DC4</td>
<td align="center">&amp;#020;</td>
<td align="left">Device Control 4 (设备控制4)</td>
</tr>
<tr>
<td align="right">21</td>
<td align="right">025</td>
<td align="right">15</td>
<td align="right">00010101</td>
<td align="center">NAK</td>
<td align="center">&amp;#021;</td>
<td align="left">Negative Acknowledgement (拒绝接收)</td>
</tr>
<tr>
<td align="right">22</td>
<td align="right">026</td>
<td align="right">16</td>
<td align="right">00010110</td>
<td align="center">SYN</td>
<td align="center">&amp;#022;</td>
<td align="left">Synchronous Idle (同步空闲)</td>
</tr>
<tr>
<td align="right">23</td>
<td align="right">027</td>
<td align="right">17</td>
<td align="right">00010111</td>
<td align="center">ETB</td>
<td align="center">&amp;#023;</td>
<td align="left">End of Transmit Block (传输块结束)</td>
</tr>
<tr>
<td align="right">24</td>
<td align="right">030</td>
<td align="right">18</td>
<td align="right">00011000</td>
<td align="center">CAN</td>
<td align="center">&amp;#024;</td>
<td align="left">Cancel (取消)</td>
</tr>
<tr>
<td align="right">25</td>
<td align="right">031</td>
<td align="right">19</td>
<td align="right">00011001</td>
<td align="center">EM</td>
<td align="center">&amp;#025;</td>
<td align="left">End of Medium (介质中断)</td>
</tr>
<tr>
<td align="right">26</td>
<td align="right">032</td>
<td align="right">1A</td>
<td align="right">00011010</td>
<td align="center">SUB</td>
<td align="center">&amp;#026;</td>
<td align="left">Substitute (替补)</td>
</tr>
<tr>
<td align="right">27</td>
<td align="right">033</td>
<td align="right">1B</td>
<td align="right">00011011</td>
<td align="center">ESC</td>
<td align="center">&amp;#027;</td>
<td align="left">Escape (溢出)</td>
</tr>
<tr>
<td align="right">28</td>
<td align="right">034</td>
<td align="right">1C</td>
<td align="right">00011100</td>
<td align="center">FS</td>
<td align="center">&amp;#028;</td>
<td align="left">File Separator (文件分割符)</td>
</tr>
<tr>
<td align="right">29</td>
<td align="right">035</td>
<td align="right">1D</td>
<td align="right">00011101</td>
<td align="center">GS</td>
<td align="center">&amp;#029;</td>
<td align="left">Group Separator (分组符)</td>
</tr>
<tr>
<td align="right">30</td>
<td align="right">036</td>
<td align="right">1E</td>
<td align="right">00011110</td>
<td align="center">RS</td>
<td align="center">&amp;#030;</td>
<td align="left">Record Separator (记录分离符)</td>
</tr>
<tr>
<td align="right">31</td>
<td align="right">037</td>
<td align="right">1F</td>
<td align="right">00011111</td>
<td align="center">US</td>
<td align="center">&amp;#031;</td>
<td align="left">Unit Separator (单元分隔符)</td>
</tr>
<tr>
<td align="right">32</td>
<td align="right">040</td>
<td align="right">20</td>
<td align="right">00100000</td>
<td align="center"></td>
<td align="center">&amp;#32;</td>
<td align="left">Space (空格)</td>
</tr>
<tr>
<td align="right">33</td>
<td align="right">041</td>
<td align="right">21</td>
<td align="right">00100001</td>
<td align="center">!</td>
<td align="center">&amp;#33;</td>
<td align="left">Exclamation mark</td>
</tr>
<tr>
<td align="right">34</td>
<td align="right">042</td>
<td align="right">22</td>
<td align="right">00100010</td>
<td align="center">“</td>
<td align="center">&amp;#34;</td>
<td align="left">Double quotes</td>
</tr>
<tr>
<td align="right">35</td>
<td align="right">043</td>
<td align="right">23</td>
<td align="right">00100011</td>
<td align="center">#</td>
<td align="center">&amp;#35;</td>
<td align="left">Number</td>
</tr>
<tr>
<td align="right">36</td>
<td align="right">044</td>
<td align="right">24</td>
<td align="right">00100100</td>
<td align="center">$</td>
<td align="center">&amp;#36;</td>
<td align="left">Dollar</td>
</tr>
<tr>
<td align="right">37</td>
<td align="right">045</td>
<td align="right">25</td>
<td align="right">00100101</td>
<td align="center">%</td>
<td align="center">&amp;#37;</td>
<td align="left">Procenttecken</td>
</tr>
<tr>
<td align="right">38</td>
<td align="right">046</td>
<td align="right">26</td>
<td align="right">00100110</td>
<td align="center">&amp;</td>
<td align="center">&amp;#38;</td>
<td align="left">Ampersand</td>
</tr>
<tr>
<td align="right">39</td>
<td align="right">047</td>
<td align="right">27</td>
<td align="right">00100111</td>
<td align="center">‘</td>
<td align="center">&amp;#39;</td>
<td align="left">Single quote</td>
</tr>
<tr>
<td align="right">40</td>
<td align="right">050</td>
<td align="right">28</td>
<td align="right">00101000</td>
<td align="center">(</td>
<td align="center">&amp;#40;</td>
<td align="left">Open parenthesis</td>
</tr>
<tr>
<td align="right">41</td>
<td align="right">051</td>
<td align="right">29</td>
<td align="right">00101001</td>
<td align="center">)</td>
<td align="center">&amp;#41;</td>
<td align="left">Close parenthesis</td>
</tr>
<tr>
<td align="right">42</td>
<td align="right">052</td>
<td align="right">2A</td>
<td align="right">00101010</td>
<td align="center">*</td>
<td align="center">&amp;#42;</td>
<td align="left">Asterisk</td>
</tr>
<tr>
<td align="right">43</td>
<td align="right">053</td>
<td align="right">2B</td>
<td align="right">00101011</td>
<td align="center">+</td>
<td align="center">&amp;#43;</td>
<td align="left">Plus</td>
</tr>
<tr>
<td align="right">44</td>
<td align="right">054</td>
<td align="right">2C</td>
<td align="right">00101100</td>
<td align="center">,</td>
<td align="center">&amp;#44;</td>
<td align="left">Comma</td>
</tr>
<tr>
<td align="right">45</td>
<td align="right">055</td>
<td align="right">2D</td>
<td align="right">00101101</td>
<td align="center">-</td>
<td align="center">&amp;#45;</td>
<td align="left">Hyphen</td>
</tr>
<tr>
<td align="right">46</td>
<td align="right">056</td>
<td align="right">2E</td>
<td align="right">00101110</td>
<td align="center">.</td>
<td align="center">&amp;#46;</td>
<td align="left">Period, dot or full stop</td>
</tr>
<tr>
<td align="right">47</td>
<td align="right">057</td>
<td align="right">2F</td>
<td align="right">00101111</td>
<td align="center">/</td>
<td align="center">&amp;#47;</td>
<td align="left">Slash or divide</td>
</tr>
<tr>
<td align="right">48</td>
<td align="right">060</td>
<td align="right">30</td>
<td align="right">00110000</td>
<td align="center">0</td>
<td align="center">&amp;#48;</td>
<td align="left">Zero</td>
</tr>
<tr>
<td align="right">49</td>
<td align="right">061</td>
<td align="right">31</td>
<td align="right">00110001</td>
<td align="center">1</td>
<td align="center">&amp;#49;</td>
<td align="left">One</td>
</tr>
<tr>
<td align="right">50</td>
<td align="right">062</td>
<td align="right">32</td>
<td align="right">00110010</td>
<td align="center">2</td>
<td align="center">&amp;#50;</td>
<td align="left">Two</td>
</tr>
<tr>
<td align="right">51</td>
<td align="right">063</td>
<td align="right">33</td>
<td align="right">00110011</td>
<td align="center">3</td>
<td align="center">&amp;#51;</td>
<td align="left">Three</td>
</tr>
<tr>
<td align="right">52</td>
<td align="right">064</td>
<td align="right">34</td>
<td align="right">00110100</td>
<td align="center">4</td>
<td align="center">&amp;#52;</td>
<td align="left">Four</td>
</tr>
<tr>
<td align="right">53</td>
<td align="right">065</td>
<td align="right">35</td>
<td align="right">00110101</td>
<td align="center">5</td>
<td align="center">&amp;#53;</td>
<td align="left">Five</td>
</tr>
<tr>
<td align="right">54</td>
<td align="right">066</td>
<td align="right">36</td>
<td align="right">00110110</td>
<td align="center">6</td>
<td align="center">&amp;#54;</td>
<td align="left">Six</td>
</tr>
<tr>
<td align="right">55</td>
<td align="right">067</td>
<td align="right">37</td>
<td align="right">00110111</td>
<td align="center">7</td>
<td align="center">&amp;#55;</td>
<td align="left">Seven</td>
</tr>
<tr>
<td align="right">56</td>
<td align="right">070</td>
<td align="right">38</td>
<td align="right">00111000</td>
<td align="center">8</td>
<td align="center">&amp;#56;</td>
<td align="left">Eight</td>
</tr>
<tr>
<td align="right">57</td>
<td align="right">071</td>
<td align="right">39</td>
<td align="right">00111001</td>
<td align="center">9</td>
<td align="center">&amp;#57;</td>
<td align="left">Nine</td>
</tr>
<tr>
<td align="right">58</td>
<td align="right">072</td>
<td align="right">3A</td>
<td align="right">00111010</td>
<td align="center">:</td>
<td align="center">&amp;#58;</td>
<td align="left">Colon</td>
</tr>
<tr>
<td align="right">59</td>
<td align="right">073</td>
<td align="right">3B</td>
<td align="right">00111011</td>
<td align="center">;</td>
<td align="center">&amp;#59;</td>
<td align="left">Semicolon</td>
</tr>
<tr>
<td align="right">60</td>
<td align="right">074</td>
<td align="right">3C</td>
<td align="right">00111100</td>
<td align="center">&lt;</td>
<td align="center">&amp;#60;</td>
<td align="left">Less than</td>
</tr>
<tr>
<td align="right">61</td>
<td align="right">075</td>
<td align="right">3D</td>
<td align="right">00111101</td>
<td align="center">=</td>
<td align="center">&amp;#61;</td>
<td align="left">Equals</td>
</tr>
<tr>
<td align="right">62</td>
<td align="right">076</td>
<td align="right">3E</td>
<td align="right">00111110</td>
<td align="center">&gt;</td>
<td align="center">&amp;#62;</td>
<td align="left">Greater than</td>
</tr>
<tr>
<td align="right">63</td>
<td align="right">077</td>
<td align="right">3F</td>
<td align="right">00111111</td>
<td align="center">?</td>
<td align="center">&amp;#63;</td>
<td align="left">Question mark</td>
</tr>
<tr>
<td align="right">64</td>
<td align="right">100</td>
<td align="right">40</td>
<td align="right">01000000</td>
<td align="center">@</td>
<td align="center">&amp;#64;</td>
<td align="left">At symbol</td>
</tr>
<tr>
<td align="right">65</td>
<td align="right">101</td>
<td align="right">41</td>
<td align="right">01000001</td>
<td align="center">A</td>
<td align="center">&amp;#65;</td>
<td align="left">Uppercase A</td>
</tr>
<tr>
<td align="right">66</td>
<td align="right">102</td>
<td align="right">42</td>
<td align="right">01000010</td>
<td align="center">B</td>
<td align="center">&amp;#66;</td>
<td align="left">Uppercase B</td>
</tr>
<tr>
<td align="right">67</td>
<td align="right">103</td>
<td align="right">43</td>
<td align="right">01000011</td>
<td align="center">C</td>
<td align="center">&amp;#67;</td>
<td align="left">Uppercase C</td>
</tr>
<tr>
<td align="right">68</td>
<td align="right">104</td>
<td align="right">44</td>
<td align="right">01000100</td>
<td align="center">D</td>
<td align="center">&amp;#68;</td>
<td align="left">Uppercase D</td>
</tr>
<tr>
<td align="right">69</td>
<td align="right">105</td>
<td align="right">45</td>
<td align="right">01000101</td>
<td align="center">E</td>
<td align="center">&amp;#69;</td>
<td align="left">Uppercase E</td>
</tr>
<tr>
<td align="right">70</td>
<td align="right">106</td>
<td align="right">46</td>
<td align="right">01000110</td>
<td align="center">F</td>
<td align="center">&amp;#70;</td>
<td align="left">Uppercase F</td>
</tr>
<tr>
<td align="right">71</td>
<td align="right">107</td>
<td align="right">47</td>
<td align="right">01000111</td>
<td align="center">G</td>
<td align="center">&amp;#71;</td>
<td align="left">Uppercase G</td>
</tr>
<tr>
<td align="right">72</td>
<td align="right">110</td>
<td align="right">48</td>
<td align="right">01001000</td>
<td align="center">H</td>
<td align="center">&amp;#72;</td>
<td align="left">Uppercase H</td>
</tr>
<tr>
<td align="right">73</td>
<td align="right">111</td>
<td align="right">49</td>
<td align="right">01001001</td>
<td align="center">I</td>
<td align="center">&amp;#73;</td>
<td align="left">Uppercase I</td>
</tr>
<tr>
<td align="right">74</td>
<td align="right">112</td>
<td align="right">4A</td>
<td align="right">01001010</td>
<td align="center">J</td>
<td align="center">&amp;#74;</td>
<td align="left">Uppercase J</td>
</tr>
<tr>
<td align="right">75</td>
<td align="right">113</td>
<td align="right">4B</td>
<td align="right">01001011</td>
<td align="center">K</td>
<td align="center">&amp;#75;</td>
<td align="left">Uppercase K</td>
</tr>
<tr>
<td align="right">76</td>
<td align="right">114</td>
<td align="right">4C</td>
<td align="right">01001100</td>
<td align="center">L</td>
<td align="center">&amp;#76;</td>
<td align="left">Uppercase L</td>
</tr>
<tr>
<td align="right">77</td>
<td align="right">115</td>
<td align="right">4D</td>
<td align="right">01001101</td>
<td align="center">M</td>
<td align="center">&amp;#77;</td>
<td align="left">Uppercase M</td>
</tr>
<tr>
<td align="right">78</td>
<td align="right">116</td>
<td align="right">4E</td>
<td align="right">01001110</td>
<td align="center">N</td>
<td align="center">&amp;#78;</td>
<td align="left">Uppercase N</td>
</tr>
<tr>
<td align="right">79</td>
<td align="right">117</td>
<td align="right">4F</td>
<td align="right">01001111</td>
<td align="center">O</td>
<td align="center">&amp;#79;</td>
<td align="left">Uppercase O</td>
</tr>
<tr>
<td align="right">80</td>
<td align="right">120</td>
<td align="right">50</td>
<td align="right">01010000</td>
<td align="center">P</td>
<td align="center">&amp;#80;</td>
<td align="left">Uppercase P</td>
</tr>
<tr>
<td align="right">81</td>
<td align="right">121</td>
<td align="right">51</td>
<td align="right">01010001</td>
<td align="center">Q</td>
<td align="center">&amp;#81;</td>
<td align="left">Uppercase Q</td>
</tr>
<tr>
<td align="right">82</td>
<td align="right">122</td>
<td align="right">52</td>
<td align="right">01010010</td>
<td align="center">R</td>
<td align="center">&amp;#82;</td>
<td align="left">Uppercase R</td>
</tr>
<tr>
<td align="right">83</td>
<td align="right">123</td>
<td align="right">53</td>
<td align="right">01010011</td>
<td align="center">S</td>
<td align="center">&amp;#83;</td>
<td align="left">Uppercase S</td>
</tr>
<tr>
<td align="right">84</td>
<td align="right">124</td>
<td align="right">54</td>
<td align="right">01010100</td>
<td align="center">T</td>
<td align="center">&amp;#84;</td>
<td align="left">Uppercase T</td>
</tr>
<tr>
<td align="right">85</td>
<td align="right">125</td>
<td align="right">55</td>
<td align="right">01010101</td>
<td align="center">U</td>
<td align="center">&amp;#85;</td>
<td align="left">Uppercase U</td>
</tr>
<tr>
<td align="right">86</td>
<td align="right">126</td>
<td align="right">56</td>
<td align="right">01010110</td>
<td align="center">V</td>
<td align="center">&amp;#86;</td>
<td align="left">Uppercase V</td>
</tr>
<tr>
<td align="right">87</td>
<td align="right">127</td>
<td align="right">57</td>
<td align="right">01010111</td>
<td align="center">W</td>
<td align="center">&amp;#87;</td>
<td align="left">Uppercase W</td>
</tr>
<tr>
<td align="right">88</td>
<td align="right">130</td>
<td align="right">58</td>
<td align="right">01011000</td>
<td align="center">X</td>
<td align="center">&amp;#88;</td>
<td align="left">Uppercase X</td>
</tr>
<tr>
<td align="right">89</td>
<td align="right">131</td>
<td align="right">59</td>
<td align="right">01011001</td>
<td align="center">Y</td>
<td align="center">&amp;#89;</td>
<td align="left">Uppercase Y</td>
</tr>
<tr>
<td align="right">90</td>
<td align="right">132</td>
<td align="right">5A</td>
<td align="right">01011010</td>
<td align="center">Z</td>
<td align="center">&amp;#90;</td>
<td align="left">Uppercase Z</td>
</tr>
<tr>
<td align="right">91</td>
<td align="right">133</td>
<td align="right">5B</td>
<td align="right">01011011</td>
<td align="center">[</td>
<td align="center">&amp;#91;</td>
<td align="left">Opening bracket</td>
</tr>
<tr>
<td align="right">92</td>
<td align="right">134</td>
<td align="right">5C</td>
<td align="right">01011100</td>
<td align="center">\</td>
<td align="center">&amp;#92;</td>
<td align="left">Backslash</td>
</tr>
<tr>
<td align="right">93</td>
<td align="right">135</td>
<td align="right">5D</td>
<td align="right">01011101</td>
<td align="center">]</td>
<td align="center">&amp;#93;</td>
<td align="left">Closing bracket</td>
</tr>
<tr>
<td align="right">94</td>
<td align="right">136</td>
<td align="right">5E</td>
<td align="right">01011110</td>
<td align="center">^</td>
<td align="center">&amp;#94;</td>
<td align="left">Caret - circumflex</td>
</tr>
<tr>
<td align="right">95</td>
<td align="right">137</td>
<td align="right">5F</td>
<td align="right">01011111</td>
<td align="center">_</td>
<td align="center">&amp;#95;</td>
<td align="left">Underscore</td>
</tr>
<tr>
<td align="right">96</td>
<td align="right">140</td>
<td align="right">60</td>
<td align="right">01100000</td>
<td align="center">`</td>
<td align="center">&amp;#96;</td>
<td align="left">Grave accent</td>
</tr>
<tr>
<td align="right">97</td>
<td align="right">141</td>
<td align="right">61</td>
<td align="right">01100001</td>
<td align="center">a</td>
<td align="center">&amp;#97;</td>
<td align="left">Lowercase a</td>
</tr>
<tr>
<td align="right">98</td>
<td align="right">142</td>
<td align="right">62</td>
<td align="right">01100010</td>
<td align="center">b</td>
<td align="center">&amp;#98;</td>
<td align="left">Lowercase b</td>
</tr>
<tr>
<td align="right">99</td>
<td align="right">143</td>
<td align="right">63</td>
<td align="right">01100011</td>
<td align="center">c</td>
<td align="center">&amp;#99;</td>
<td align="left">Lowercase c</td>
</tr>
<tr>
<td align="right">100</td>
<td align="right">144</td>
<td align="right">64</td>
<td align="right">01100100</td>
<td align="center">d</td>
<td align="center">&amp;#100;</td>
<td align="left">Lowercase d</td>
</tr>
<tr>
<td align="right">101</td>
<td align="right">145</td>
<td align="right">65</td>
<td align="right">01100101</td>
<td align="center">e</td>
<td align="center">&amp;#101;</td>
<td align="left">Lowercase e</td>
</tr>
<tr>
<td align="right">102</td>
<td align="right">146</td>
<td align="right">66</td>
<td align="right">01100110</td>
<td align="center">f</td>
<td align="center">&amp;#102;</td>
<td align="left">Lowercase f</td>
</tr>
<tr>
<td align="right">103</td>
<td align="right">147</td>
<td align="right">67</td>
<td align="right">01100111</td>
<td align="center">g</td>
<td align="center">&amp;#103;</td>
<td align="left">Lowercase g</td>
</tr>
<tr>
<td align="right">104</td>
<td align="right">150</td>
<td align="right">68</td>
<td align="right">01101000</td>
<td align="center">h</td>
<td align="center">&amp;#104;</td>
<td align="left">Lowercase h</td>
</tr>
<tr>
<td align="right">105</td>
<td align="right">151</td>
<td align="right">69</td>
<td align="right">01101001</td>
<td align="center">i</td>
<td align="center">&amp;#105;</td>
<td align="left">Lowercase i</td>
</tr>
<tr>
<td align="right">106</td>
<td align="right">152</td>
<td align="right">6A</td>
<td align="right">01101010</td>
<td align="center">j</td>
<td align="center">&amp;#106;</td>
<td align="left">Lowercase j</td>
</tr>
<tr>
<td align="right">107</td>
<td align="right">153</td>
<td align="right">6B</td>
<td align="right">01101011</td>
<td align="center">k</td>
<td align="center">&amp;#107;</td>
<td align="left">Lowercase k</td>
</tr>
<tr>
<td align="right">108</td>
<td align="right">154</td>
<td align="right">6C</td>
<td align="right">01101100</td>
<td align="center">l</td>
<td align="center">&amp;#108;</td>
<td align="left">Lowercase l</td>
</tr>
<tr>
<td align="right">109</td>
<td align="right">155</td>
<td align="right">6D</td>
<td align="right">01101101</td>
<td align="center">m</td>
<td align="center">&amp;#109;</td>
<td align="left">Lowercase m</td>
</tr>
<tr>
<td align="right">110</td>
<td align="right">156</td>
<td align="right">6E</td>
<td align="right">01101110</td>
<td align="center">n</td>
<td align="center">&amp;#110;</td>
<td align="left">Lowercase n</td>
</tr>
<tr>
<td align="right">111</td>
<td align="right">157</td>
<td align="right">6F</td>
<td align="right">01101111</td>
<td align="center">o</td>
<td align="center">&amp;#111;</td>
<td align="left">Lowercase o</td>
</tr>
<tr>
<td align="right">112</td>
<td align="right">160</td>
<td align="right">70</td>
<td align="right">01110000</td>
<td align="center">p</td>
<td align="center">&amp;#112;</td>
<td align="left">Lowercase p</td>
</tr>
<tr>
<td align="right">113</td>
<td align="right">161</td>
<td align="right">71</td>
<td align="right">01110001</td>
<td align="center">q</td>
<td align="center">&amp;#113;</td>
<td align="left">Lowercase q</td>
</tr>
<tr>
<td align="right">114</td>
<td align="right">162</td>
<td align="right">72</td>
<td align="right">01110010</td>
<td align="center">r</td>
<td align="center">&amp;#114;</td>
<td align="left">Lowercase r</td>
</tr>
<tr>
<td align="right">115</td>
<td align="right">163</td>
<td align="right">73</td>
<td align="right">01110011</td>
<td align="center">s</td>
<td align="center">&amp;#115;</td>
<td align="left">Lowercase s</td>
</tr>
<tr>
<td align="right">116</td>
<td align="right">164</td>
<td align="right">74</td>
<td align="right">01110100</td>
<td align="center">t</td>
<td align="center">&amp;#116;</td>
<td align="left">Lowercase t</td>
</tr>
<tr>
<td align="right">117</td>
<td align="right">165</td>
<td align="right">75</td>
<td align="right">01110101</td>
<td align="center">u</td>
<td align="center">&amp;#117;</td>
<td align="left">Lowercase u</td>
</tr>
<tr>
<td align="right">118</td>
<td align="right">166</td>
<td align="right">76</td>
<td align="right">01110110</td>
<td align="center">v</td>
<td align="center">&amp;#118;</td>
<td align="left">Lowercase v</td>
</tr>
<tr>
<td align="right">119</td>
<td align="right">167</td>
<td align="right">77</td>
<td align="right">01110111</td>
<td align="center">w</td>
<td align="center">&amp;#119;</td>
<td align="left">Lowercase w</td>
</tr>
<tr>
<td align="right">120</td>
<td align="right">170</td>
<td align="right">78</td>
<td align="right">01111000</td>
<td align="center">x</td>
<td align="center">&amp;#120;</td>
<td align="left">Lowercase x</td>
</tr>
<tr>
<td align="right">121</td>
<td align="right">171</td>
<td align="right">79</td>
<td align="right">01111001</td>
<td align="center">y</td>
<td align="center">&amp;#121;</td>
<td align="left">Lowercase y</td>
</tr>
<tr>
<td align="right">122</td>
<td align="right">172</td>
<td align="right">7A</td>
<td align="right">01111010</td>
<td align="center">z</td>
<td align="center">&amp;#122;</td>
<td align="left">Lowercase z</td>
</tr>
<tr>
<td align="right">123</td>
<td align="right">173</td>
<td align="right">7B</td>
<td align="right">01111011</td>
<td align="center">{</td>
<td align="center">&amp;#123;</td>
<td align="left">Opening brace</td>
</tr>
<tr>
<td align="right">124</td>
<td align="right">174</td>
<td align="right">7C</td>
<td align="right">01111100</td>
<td align="center">|</td>
<td align="center">&amp;#124;</td>
<td align="left">Vertical bar</td>
</tr>
<tr>
<td align="right">125</td>
<td align="right">175</td>
<td align="right">7D</td>
<td align="right">01111101</td>
<td align="center">}</td>
<td align="center">&amp;#125;</td>
<td align="left">Closing brace</td>
</tr>
<tr>
<td align="right">126</td>
<td align="right">176</td>
<td align="right">7E</td>
<td align="right">01111110</td>
<td align="center">~</td>
<td align="center">&amp;#126;</td>
<td align="left">Equivalency sign (tilde)</td>
</tr>
<tr>
<td align="right">127</td>
<td align="right">177</td>
<td align="right">7F</td>
<td align="right">01111111</td>
<td align="center"></td>
<td align="center">&amp;#127;</td>
<td align="left">Delete</td>
</tr>
</tbody></table>
<h3 id="5-2-拓展ASCII码："><a href="#5-2-拓展ASCII码：" class="headerlink" title="5.2 拓展ASCII码："></a>5.2 拓展ASCII码：</h3><table>
<thead>
<tr>
<th align="right">DEC</th>
<th align="right">OCT</th>
<th align="right">HEX</th>
<th align="right">BIN</th>
<th align="center">缩写/符号</th>
<th align="center">HTML实体</th>
<th align="left">描述</th>
</tr>
</thead>
<tbody><tr>
<td align="right">128</td>
<td align="right">200</td>
<td align="right">80</td>
<td align="right">10000000</td>
<td align="center">€</td>
<td align="center">&amp;#128;</td>
<td align="left">Euro sign</td>
</tr>
<tr>
<td align="right">129</td>
<td align="right">201</td>
<td align="right">81</td>
<td align="right">10000001</td>
<td align="center"></td>
<td align="center"></td>
<td align="left"></td>
</tr>
<tr>
<td align="right">130</td>
<td align="right">202</td>
<td align="right">82</td>
<td align="right">10000010</td>
<td align="center">‚</td>
<td align="center">&amp;#130;</td>
<td align="left">Single low-9 quotation mark</td>
</tr>
<tr>
<td align="right">131</td>
<td align="right">203</td>
<td align="right">83</td>
<td align="right">10000011</td>
<td align="center">ƒ</td>
<td align="center">&amp;#131;</td>
<td align="left">Latin small letter f with hook</td>
</tr>
<tr>
<td align="right">132</td>
<td align="right">204</td>
<td align="right">84</td>
<td align="right">10000100</td>
<td align="center">„</td>
<td align="center">&amp;#132;</td>
<td align="left">Double low-9 quotation mark</td>
</tr>
<tr>
<td align="right">133</td>
<td align="right">205</td>
<td align="right">85</td>
<td align="right">10000101</td>
<td align="center">…</td>
<td align="center">&amp;#133;</td>
<td align="left">Horizontal ellipsis</td>
</tr>
<tr>
<td align="right">134</td>
<td align="right">206</td>
<td align="right">86</td>
<td align="right">10000110</td>
<td align="center">†</td>
<td align="center">&amp;#134;</td>
<td align="left">Dagger</td>
</tr>
<tr>
<td align="right">135</td>
<td align="right">207</td>
<td align="right">87</td>
<td align="right">10000111</td>
<td align="center">‡</td>
<td align="center">&amp;#135;</td>
<td align="left">Double dagger</td>
</tr>
<tr>
<td align="right">136</td>
<td align="right">210</td>
<td align="right">88</td>
<td align="right">10001000</td>
<td align="center">ˆ</td>
<td align="center">&amp;#136;</td>
<td align="left">Modifier letter circumflex accent</td>
</tr>
<tr>
<td align="right">137</td>
<td align="right">211</td>
<td align="right">89</td>
<td align="right">10001001</td>
<td align="center">‰</td>
<td align="center">&amp;#137;</td>
<td align="left">Per mille sign</td>
</tr>
<tr>
<td align="right">138</td>
<td align="right">212</td>
<td align="right">8A</td>
<td align="right">10001010</td>
<td align="center">Š</td>
<td align="center">&amp;#138;</td>
<td align="left">Latin capital letter S with caron</td>
</tr>
<tr>
<td align="right">139</td>
<td align="right">213</td>
<td align="right">8B</td>
<td align="right">10001011</td>
<td align="center">‹</td>
<td align="center">&amp;#139;</td>
<td align="left">Single left-pointing angle quotation</td>
</tr>
<tr>
<td align="right">140</td>
<td align="right">214</td>
<td align="right">8C</td>
<td align="right">10001100</td>
<td align="center">Œ</td>
<td align="center">&amp;#140;</td>
<td align="left">Latin capital ligature OE</td>
</tr>
<tr>
<td align="right">141</td>
<td align="right">215</td>
<td align="right">8D</td>
<td align="right">10001101</td>
<td align="center"></td>
<td align="center"></td>
<td align="left"></td>
</tr>
<tr>
<td align="right">142</td>
<td align="right">216</td>
<td align="right">8E</td>
<td align="right">10001110</td>
<td align="center">Ž</td>
<td align="center">&amp;#142;</td>
<td align="left">Latin capital letter Z with caron</td>
</tr>
<tr>
<td align="right">143</td>
<td align="right">217</td>
<td align="right">8F</td>
<td align="right">10001111</td>
<td align="center"></td>
<td align="center"></td>
<td align="left"></td>
</tr>
<tr>
<td align="right">144</td>
<td align="right">220</td>
<td align="right">90</td>
<td align="right">10010000</td>
<td align="center"></td>
<td align="center"></td>
<td align="left"></td>
</tr>
<tr>
<td align="right">145</td>
<td align="right">221</td>
<td align="right">91</td>
<td align="right">10010001</td>
<td align="center">‘</td>
<td align="center">&amp;#145;</td>
<td align="left">Left single quotation mark</td>
</tr>
<tr>
<td align="right">146</td>
<td align="right">222</td>
<td align="right">92</td>
<td align="right">10010010</td>
<td align="center">’</td>
<td align="center">&amp;#146;</td>
<td align="left">Right single quotation mark</td>
</tr>
<tr>
<td align="right">147</td>
<td align="right">223</td>
<td align="right">93</td>
<td align="right">10010011</td>
<td align="center">“</td>
<td align="center">&amp;#147;</td>
<td align="left">Left double quotation mark</td>
</tr>
<tr>
<td align="right">148</td>
<td align="right">224</td>
<td align="right">94</td>
<td align="right">10010100</td>
<td align="center">”</td>
<td align="center">&amp;#148;</td>
<td align="left">Right double quotation mark</td>
</tr>
<tr>
<td align="right">149</td>
<td align="right">225</td>
<td align="right">95</td>
<td align="right">10010101</td>
<td align="center">•</td>
<td align="center">&amp;#149;</td>
<td align="left">Bullet</td>
</tr>
<tr>
<td align="right">150</td>
<td align="right">226</td>
<td align="right">96</td>
<td align="right">10010110</td>
<td align="center">–</td>
<td align="center">&amp;#150;</td>
<td align="left">En dash</td>
</tr>
<tr>
<td align="right">151</td>
<td align="right">227</td>
<td align="right">97</td>
<td align="right">10010111</td>
<td align="center">—</td>
<td align="center">&amp;#151;</td>
<td align="left">Em dash</td>
</tr>
<tr>
<td align="right">152</td>
<td align="right">230</td>
<td align="right">98</td>
<td align="right">10011000</td>
<td align="center">˜</td>
<td align="center">&amp;#152;</td>
<td align="left">Small tilde</td>
</tr>
<tr>
<td align="right">153</td>
<td align="right">231</td>
<td align="right">99</td>
<td align="right">10011001</td>
<td align="center">™</td>
<td align="center">&amp;#153;</td>
<td align="left">Trade mark sign</td>
</tr>
<tr>
<td align="right">154</td>
<td align="right">232</td>
<td align="right">9A</td>
<td align="right">10011010</td>
<td align="center">š</td>
<td align="center">&amp;#154;</td>
<td align="left">Latin small letter S with caron</td>
</tr>
<tr>
<td align="right">155</td>
<td align="right">233</td>
<td align="right">9B</td>
<td align="right">10011011</td>
<td align="center">›</td>
<td align="center">&amp;#155;</td>
<td align="left">Single right-pointing angle quotation mark</td>
</tr>
<tr>
<td align="right">156</td>
<td align="right">234</td>
<td align="right">9C</td>
<td align="right">10011100</td>
<td align="center">œ</td>
<td align="center">&amp;#156;</td>
<td align="left">Latin small ligature oe</td>
</tr>
<tr>
<td align="right">157</td>
<td align="right">235</td>
<td align="right">9D</td>
<td align="right">10011101</td>
<td align="center"></td>
<td align="center"></td>
<td align="left"></td>
</tr>
<tr>
<td align="right">158</td>
<td align="right">236</td>
<td align="right">9E</td>
<td align="right">10011110</td>
<td align="center">ž</td>
<td align="center">&amp;#158;</td>
<td align="left">Latin small letter z with caron</td>
</tr>
<tr>
<td align="right">159</td>
<td align="right">237</td>
<td align="right">9F</td>
<td align="right">10011111</td>
<td align="center">Ÿ</td>
<td align="center">&amp;#159;</td>
<td align="left">Latin capital letter Y with diaeresis</td>
</tr>
<tr>
<td align="right">160</td>
<td align="right">240</td>
<td align="right">A0</td>
<td align="right">10100000</td>
<td align="center"></td>
<td align="center">&amp;#160;</td>
<td align="left">Non-breaking space</td>
</tr>
<tr>
<td align="right">161</td>
<td align="right">241</td>
<td align="right">A1</td>
<td align="right">10100001</td>
<td align="center">¡</td>
<td align="center">&amp;#161;</td>
<td align="left">Inverted exclamation mark</td>
</tr>
<tr>
<td align="right">162</td>
<td align="right">242</td>
<td align="right">A2</td>
<td align="right">10100010</td>
<td align="center">¢</td>
<td align="center">&amp;#162;</td>
<td align="left">Cent sign</td>
</tr>
<tr>
<td align="right">163</td>
<td align="right">243</td>
<td align="right">A3</td>
<td align="right">10100011</td>
<td align="center">£</td>
<td align="center">&amp;#163;</td>
<td align="left">Pound sign</td>
</tr>
<tr>
<td align="right">164</td>
<td align="right">244</td>
<td align="right">A4</td>
<td align="right">10100100</td>
<td align="center">¤</td>
<td align="center">&amp;#164;</td>
<td align="left">Currency sign</td>
</tr>
<tr>
<td align="right">165</td>
<td align="right">245</td>
<td align="right">A5</td>
<td align="right">10100101</td>
<td align="center">¥</td>
<td align="center">&amp;#165;</td>
<td align="left">Yen sign</td>
</tr>
<tr>
<td align="right">166</td>
<td align="right">246</td>
<td align="right">A6</td>
<td align="right">10100110</td>
<td align="center">¦</td>
<td align="center">&amp;#166;</td>
<td align="left">Pipe, Broken vertical bar</td>
</tr>
<tr>
<td align="right">167</td>
<td align="right">247</td>
<td align="right">A7</td>
<td align="right">10100111</td>
<td align="center">§</td>
<td align="center">&amp;#167;</td>
<td align="left">Section sign</td>
</tr>
<tr>
<td align="right">168</td>
<td align="right">250</td>
<td align="right">A8</td>
<td align="right">10101000</td>
<td align="center">¨</td>
<td align="center">&amp;#168;</td>
<td align="left">Spacing diaeresis - umlaut</td>
</tr>
<tr>
<td align="right">169</td>
<td align="right">251</td>
<td align="right">A9</td>
<td align="right">10101001</td>
<td align="center">©</td>
<td align="center">&amp;#169;</td>
<td align="left">Copyright sign</td>
</tr>
<tr>
<td align="right">170</td>
<td align="right">252</td>
<td align="right">AA</td>
<td align="right">10101010</td>
<td align="center">ª</td>
<td align="center">&amp;#170;</td>
<td align="left">Feminine ordinal indicator</td>
</tr>
<tr>
<td align="right">171</td>
<td align="right">253</td>
<td align="right">AB</td>
<td align="right">10101011</td>
<td align="center">«</td>
<td align="center">&amp;#171;</td>
<td align="left">Left double angle quotes</td>
</tr>
<tr>
<td align="right">172</td>
<td align="right">254</td>
<td align="right">AC</td>
<td align="right">10101100</td>
<td align="center">¬</td>
<td align="center">&amp;#172;</td>
<td align="left">Not sign</td>
</tr>
<tr>
<td align="right">173</td>
<td align="right">255</td>
<td align="right">AD</td>
<td align="right">10101101</td>
<td align="center">­</td>
<td align="center">&amp;#173;</td>
<td align="left">Soft hyphen</td>
</tr>
<tr>
<td align="right">174</td>
<td align="right">256</td>
<td align="right">AE</td>
<td align="right">10101110</td>
<td align="center">®</td>
<td align="center">&amp;#174;</td>
<td align="left">Registered trade mark sign</td>
</tr>
<tr>
<td align="right">175</td>
<td align="right">257</td>
<td align="right">AF</td>
<td align="right">10101111</td>
<td align="center">¯</td>
<td align="center">&amp;#175;</td>
<td align="left">Spacing macron - overline</td>
</tr>
<tr>
<td align="right">176</td>
<td align="right">260</td>
<td align="right">B0</td>
<td align="right">10110000</td>
<td align="center">°</td>
<td align="center">&amp;#176;</td>
<td align="left">Degree sign</td>
</tr>
<tr>
<td align="right">177</td>
<td align="right">261</td>
<td align="right">B1</td>
<td align="right">10110001</td>
<td align="center">±</td>
<td align="center">&amp;#177;</td>
<td align="left">Plus-or-minus sign</td>
</tr>
<tr>
<td align="right">178</td>
<td align="right">262</td>
<td align="right">B2</td>
<td align="right">10110010</td>
<td align="center">²</td>
<td align="center">&amp;#178;</td>
<td align="left">Superscript two - squared</td>
</tr>
<tr>
<td align="right">179</td>
<td align="right">263</td>
<td align="right">B3</td>
<td align="right">10110011</td>
<td align="center">³</td>
<td align="center">&amp;#179;</td>
<td align="left">Superscript three - cubed</td>
</tr>
<tr>
<td align="right">180</td>
<td align="right">264</td>
<td align="right">B4</td>
<td align="right">10110100</td>
<td align="center">´</td>
<td align="center">&amp;#180;</td>
<td align="left">Acute accent - spacing acute</td>
</tr>
<tr>
<td align="right">181</td>
<td align="right">265</td>
<td align="right">B5</td>
<td align="right">10110101</td>
<td align="center">µ</td>
<td align="center">&amp;#181;</td>
<td align="left">Micro sign</td>
</tr>
<tr>
<td align="right">182</td>
<td align="right">266</td>
<td align="right">B6</td>
<td align="right">10110110</td>
<td align="center">¶</td>
<td align="center">&amp;#182;</td>
<td align="left">Pilcrow sign - paragraph sign</td>
</tr>
<tr>
<td align="right">183</td>
<td align="right">267</td>
<td align="right">B7</td>
<td align="right">10110111</td>
<td align="center">·</td>
<td align="center">&amp;#183;</td>
<td align="left">Middle dot - Georgian comma</td>
</tr>
<tr>
<td align="right">184</td>
<td align="right">270</td>
<td align="right">B8</td>
<td align="right">10111000</td>
<td align="center">¸</td>
<td align="center">&amp;#184;</td>
<td align="left">Spacing cedilla</td>
</tr>
<tr>
<td align="right">185</td>
<td align="right">271</td>
<td align="right">B9</td>
<td align="right">10111001</td>
<td align="center">¹</td>
<td align="center">&amp;#185;</td>
<td align="left">Superscript one</td>
</tr>
<tr>
<td align="right">186</td>
<td align="right">272</td>
<td align="right">BA</td>
<td align="right">10111010</td>
<td align="center">º</td>
<td align="center">&amp;#186;</td>
<td align="left">Masculine ordinal indicator</td>
</tr>
<tr>
<td align="right">187</td>
<td align="right">273</td>
<td align="right">BB</td>
<td align="right">10111011</td>
<td align="center">»</td>
<td align="center">&amp;#187;</td>
<td align="left">Right double angle quotes</td>
</tr>
<tr>
<td align="right">188</td>
<td align="right">274</td>
<td align="right">BC</td>
<td align="right">10111100</td>
<td align="center">¼</td>
<td align="center">&amp;#188;</td>
<td align="left">Fraction one quarter</td>
</tr>
<tr>
<td align="right">189</td>
<td align="right">275</td>
<td align="right">BD</td>
<td align="right">10111101</td>
<td align="center">½</td>
<td align="center">&amp;#189;</td>
<td align="left">Fraction one half</td>
</tr>
<tr>
<td align="right">190</td>
<td align="right">276</td>
<td align="right">BE</td>
<td align="right">10111110</td>
<td align="center">¾</td>
<td align="center">&amp;#190;</td>
<td align="left">Fraction three quarters</td>
</tr>
<tr>
<td align="right">191</td>
<td align="right">277</td>
<td align="right">BF</td>
<td align="right">10111111</td>
<td align="center">¿</td>
<td align="center">&amp;#191;</td>
<td align="left">Inverted question mark</td>
</tr>
<tr>
<td align="right">192</td>
<td align="right">300</td>
<td align="right">C0</td>
<td align="right">11000000</td>
<td align="center">À</td>
<td align="center">&amp;#192;</td>
<td align="left">Latin capital letter A with grave</td>
</tr>
<tr>
<td align="right">193</td>
<td align="right">301</td>
<td align="right">C1</td>
<td align="right">11000001</td>
<td align="center">Á</td>
<td align="center">&amp;#193;</td>
<td align="left">Latin capital letter A with acute</td>
</tr>
<tr>
<td align="right">194</td>
<td align="right">302</td>
<td align="right">C2</td>
<td align="right">11000010</td>
<td align="center">Â</td>
<td align="center">&amp;#194;</td>
<td align="left">Latin capital letter A with circumflex</td>
</tr>
<tr>
<td align="right">195</td>
<td align="right">303</td>
<td align="right">C3</td>
<td align="right">11000011</td>
<td align="center">Ã</td>
<td align="center">&amp;#195;</td>
<td align="left">Latin capital letter A with tilde</td>
</tr>
<tr>
<td align="right">196</td>
<td align="right">304</td>
<td align="right">C4</td>
<td align="right">11000100</td>
<td align="center">Ä</td>
<td align="center">&amp;#196;</td>
<td align="left">Latin capital letter A with diaeresis</td>
</tr>
<tr>
<td align="right">197</td>
<td align="right">305</td>
<td align="right">C5</td>
<td align="right">11000101</td>
<td align="center">Å</td>
<td align="center">&amp;#197;</td>
<td align="left">Latin capital letter A with ring above</td>
</tr>
<tr>
<td align="right">198</td>
<td align="right">306</td>
<td align="right">C6</td>
<td align="right">11000110</td>
<td align="center">Æ</td>
<td align="center">&amp;#198;</td>
<td align="left">Latin capital letter AE</td>
</tr>
<tr>
<td align="right">199</td>
<td align="right">307</td>
<td align="right">C7</td>
<td align="right">11000111</td>
<td align="center">Ç</td>
<td align="center">&amp;#199;</td>
<td align="left">Latin capital letter C with cedilla</td>
</tr>
<tr>
<td align="right">200</td>
<td align="right">310</td>
<td align="right">C8</td>
<td align="right">11001000</td>
<td align="center">È</td>
<td align="center">&amp;#200;</td>
<td align="left">Latin capital letter E with grave</td>
</tr>
<tr>
<td align="right">201</td>
<td align="right">311</td>
<td align="right">C9</td>
<td align="right">11001001</td>
<td align="center">É</td>
<td align="center">&amp;#201;</td>
<td align="left">Latin capital letter E with acute</td>
</tr>
<tr>
<td align="right">202</td>
<td align="right">312</td>
<td align="right">CA</td>
<td align="right">11001010</td>
<td align="center">Ê</td>
<td align="center">&amp;#202;</td>
<td align="left">Latin capital letter E with circumflex</td>
</tr>
<tr>
<td align="right">203</td>
<td align="right">313</td>
<td align="right">CB</td>
<td align="right">11001011</td>
<td align="center">Ë</td>
<td align="center">&amp;#203;</td>
<td align="left">Latin capital letter E with diaeresis</td>
</tr>
<tr>
<td align="right">204</td>
<td align="right">314</td>
<td align="right">CC</td>
<td align="right">11001100</td>
<td align="center">Ì</td>
<td align="center">&amp;#204;</td>
<td align="left">Latin capital letter I with grave</td>
</tr>
<tr>
<td align="right">205</td>
<td align="right">315</td>
<td align="right">CD</td>
<td align="right">11001101</td>
<td align="center">Í</td>
<td align="center">&amp;#205;</td>
<td align="left">Latin capital letter I with acute</td>
</tr>
<tr>
<td align="right">206</td>
<td align="right">316</td>
<td align="right">CE</td>
<td align="right">11001110</td>
<td align="center">Î</td>
<td align="center">&amp;#206;</td>
<td align="left">Latin capital letter I with circumflex</td>
</tr>
<tr>
<td align="right">207</td>
<td align="right">317</td>
<td align="right">CF</td>
<td align="right">11001111</td>
<td align="center">Ï</td>
<td align="center">&amp;#207;</td>
<td align="left">Latin capital letter I with diaeresis</td>
</tr>
<tr>
<td align="right">208</td>
<td align="right">320</td>
<td align="right">D0</td>
<td align="right">11010000</td>
<td align="center">Ð</td>
<td align="center">&amp;#208;</td>
<td align="left">Latin capital letter ETH</td>
</tr>
<tr>
<td align="right">209</td>
<td align="right">321</td>
<td align="right">D1</td>
<td align="right">11010001</td>
<td align="center">Ñ</td>
<td align="center">&amp;#209;</td>
<td align="left">Latin capital letter N with tilde</td>
</tr>
<tr>
<td align="right">210</td>
<td align="right">322</td>
<td align="right">D2</td>
<td align="right">11010010</td>
<td align="center">Ò</td>
<td align="center">&amp;#210;</td>
<td align="left">Latin capital letter O with grave</td>
</tr>
<tr>
<td align="right">211</td>
<td align="right">323</td>
<td align="right">D3</td>
<td align="right">11010011</td>
<td align="center">Ó</td>
<td align="center">&amp;#211;</td>
<td align="left">Latin capital letter O with acute</td>
</tr>
<tr>
<td align="right">212</td>
<td align="right">324</td>
<td align="right">D4</td>
<td align="right">11010100</td>
<td align="center">Ô</td>
<td align="center">&amp;#212;</td>
<td align="left">Latin capital letter O with circumflex</td>
</tr>
<tr>
<td align="right">213</td>
<td align="right">325</td>
<td align="right">D5</td>
<td align="right">11010101</td>
<td align="center">Õ</td>
<td align="center">&amp;#213;</td>
<td align="left">Latin capital letter O with tilde</td>
</tr>
<tr>
<td align="right">214</td>
<td align="right">326</td>
<td align="right">D6</td>
<td align="right">11010110</td>
<td align="center">Ö</td>
<td align="center">&amp;#214;</td>
<td align="left">Latin capital letter O with diaeresis</td>
</tr>
<tr>
<td align="right">215</td>
<td align="right">327</td>
<td align="right">D7</td>
<td align="right">11010111</td>
<td align="center">×</td>
<td align="center">&amp;#215;</td>
<td align="left">Multiplication sign</td>
</tr>
<tr>
<td align="right">216</td>
<td align="right">330</td>
<td align="right">D8</td>
<td align="right">11011000</td>
<td align="center">Ø</td>
<td align="center">&amp;#216;</td>
<td align="left">Latin capital letter O with slash</td>
</tr>
<tr>
<td align="right">217</td>
<td align="right">331</td>
<td align="right">D9</td>
<td align="right">11011001</td>
<td align="center">Ù</td>
<td align="center">&amp;#217;</td>
<td align="left">Latin capital letter U with grave</td>
</tr>
<tr>
<td align="right">218</td>
<td align="right">332</td>
<td align="right">DA</td>
<td align="right">11011010</td>
<td align="center">Ú</td>
<td align="center">&amp;#218;</td>
<td align="left">Latin capital letter U with acute</td>
</tr>
<tr>
<td align="right">219</td>
<td align="right">333</td>
<td align="right">DB</td>
<td align="right">11011011</td>
<td align="center">Û</td>
<td align="center">&amp;#219;</td>
<td align="left">Latin capital letter U with circumflex</td>
</tr>
<tr>
<td align="right">220</td>
<td align="right">334</td>
<td align="right">DC</td>
<td align="right">11011100</td>
<td align="center">Ü</td>
<td align="center">&amp;#220;</td>
<td align="left">Latin capital letter U with diaeresis</td>
</tr>
<tr>
<td align="right">221</td>
<td align="right">335</td>
<td align="right">DD</td>
<td align="right">11011101</td>
<td align="center">Ý</td>
<td align="center">&amp;#221;</td>
<td align="left">Latin capital letter Y with acute</td>
</tr>
<tr>
<td align="right">222</td>
<td align="right">336</td>
<td align="right">DE</td>
<td align="right">11011110</td>
<td align="center">Þ</td>
<td align="center">&amp;#222;</td>
<td align="left">Latin capital letter THORN</td>
</tr>
<tr>
<td align="right">223</td>
<td align="right">337</td>
<td align="right">DF</td>
<td align="right">11011111</td>
<td align="center">ß</td>
<td align="center">&amp;#223;</td>
<td align="left">Latin small letter sharp s - ess-zed</td>
</tr>
<tr>
<td align="right">224</td>
<td align="right">340</td>
<td align="right">E0</td>
<td align="right">11100000</td>
<td align="center">à</td>
<td align="center">&amp;#224;</td>
<td align="left">Latin small letter a with grave</td>
</tr>
<tr>
<td align="right">225</td>
<td align="right">341</td>
<td align="right">E1</td>
<td align="right">11100001</td>
<td align="center">á</td>
<td align="center">&amp;#225;</td>
<td align="left">Latin small letter a with acute</td>
</tr>
<tr>
<td align="right">226</td>
<td align="right">342</td>
<td align="right">E2</td>
<td align="right">11100010</td>
<td align="center">â</td>
<td align="center">&amp;#226;</td>
<td align="left">Latin small letter a with circumflex</td>
</tr>
<tr>
<td align="right">227</td>
<td align="right">343</td>
<td align="right">E3</td>
<td align="right">11100011</td>
<td align="center">ã</td>
<td align="center">&amp;#227;</td>
<td align="left">Latin small letter a with tilde</td>
</tr>
<tr>
<td align="right">228</td>
<td align="right">344</td>
<td align="right">E4</td>
<td align="right">11100100</td>
<td align="center">ä</td>
<td align="center">&amp;#228;</td>
<td align="left">Latin small letter a with diaeresis</td>
</tr>
<tr>
<td align="right">229</td>
<td align="right">345</td>
<td align="right">E5</td>
<td align="right">11100101</td>
<td align="center">å</td>
<td align="center">&amp;#229;</td>
<td align="left">Latin small letter a with ring above</td>
</tr>
<tr>
<td align="right">230</td>
<td align="right">346</td>
<td align="right">E6</td>
<td align="right">11100110</td>
<td align="center">æ</td>
<td align="center">&amp;#230;</td>
<td align="left">Latin small letter ae</td>
</tr>
<tr>
<td align="right">231</td>
<td align="right">347</td>
<td align="right">E7</td>
<td align="right">11100111</td>
<td align="center">ç</td>
<td align="center">&amp;#231;</td>
<td align="left">Latin small letter c with cedilla</td>
</tr>
<tr>
<td align="right">232</td>
<td align="right">350</td>
<td align="right">E8</td>
<td align="right">11101000</td>
<td align="center">è</td>
<td align="center">&amp;#232;</td>
<td align="left">Latin small letter e with grave</td>
</tr>
<tr>
<td align="right">233</td>
<td align="right">351</td>
<td align="right">E9</td>
<td align="right">11101001</td>
<td align="center">é</td>
<td align="center">&amp;#233;</td>
<td align="left">Latin small letter e with acute</td>
</tr>
<tr>
<td align="right">234</td>
<td align="right">352</td>
<td align="right">EA</td>
<td align="right">11101010</td>
<td align="center">ê</td>
<td align="center">&amp;#234;</td>
<td align="left">Latin small letter e with circumflex</td>
</tr>
<tr>
<td align="right">235</td>
<td align="right">353</td>
<td align="right">EB</td>
<td align="right">11101011</td>
<td align="center">ë</td>
<td align="center">&amp;#235;</td>
<td align="left">Latin small letter e with diaeresis</td>
</tr>
<tr>
<td align="right">236</td>
<td align="right">354</td>
<td align="right">EC</td>
<td align="right">11101100</td>
<td align="center">ì</td>
<td align="center">&amp;#236;</td>
<td align="left">Latin small letter i with grave</td>
</tr>
<tr>
<td align="right">237</td>
<td align="right">355</td>
<td align="right">ED</td>
<td align="right">11101101</td>
<td align="center">í</td>
<td align="center">&amp;#237;</td>
<td align="left">Latin small letter i with acute</td>
</tr>
<tr>
<td align="right">238</td>
<td align="right">356</td>
<td align="right">EE</td>
<td align="right">11101110</td>
<td align="center">î</td>
<td align="center">&amp;#238;</td>
<td align="left">Latin small letter i with circumflex</td>
</tr>
<tr>
<td align="right">239</td>
<td align="right">357</td>
<td align="right">EF</td>
<td align="right">11101111</td>
<td align="center">ï</td>
<td align="center">&amp;#239;</td>
<td align="left">Latin small letter i with diaeresis</td>
</tr>
<tr>
<td align="right">240</td>
<td align="right">360</td>
<td align="right">F0</td>
<td align="right">11110000</td>
<td align="center">ð</td>
<td align="center">&amp;#240;</td>
<td align="left">Latin small letter eth</td>
</tr>
<tr>
<td align="right">241</td>
<td align="right">361</td>
<td align="right">F1</td>
<td align="right">11110001</td>
<td align="center">ñ</td>
<td align="center">&amp;#241;</td>
<td align="left">Latin small letter n with tilde</td>
</tr>
<tr>
<td align="right">242</td>
<td align="right">362</td>
<td align="right">F2</td>
<td align="right">11110010</td>
<td align="center">ò</td>
<td align="center">&amp;#242;</td>
<td align="left">Latin small letter o with grave</td>
</tr>
<tr>
<td align="right">243</td>
<td align="right">363</td>
<td align="right">F3</td>
<td align="right">11110011</td>
<td align="center">ó</td>
<td align="center">&amp;#243;</td>
<td align="left">Latin small letter o with acute</td>
</tr>
<tr>
<td align="right">244</td>
<td align="right">364</td>
<td align="right">F4</td>
<td align="right">11110100</td>
<td align="center">ô</td>
<td align="center">&amp;#244;</td>
<td align="left">Latin small letter o with circumflex</td>
</tr>
<tr>
<td align="right">245</td>
<td align="right">365</td>
<td align="right">F5</td>
<td align="right">11110101</td>
<td align="center">õ</td>
<td align="center">&amp;#245;</td>
<td align="left">Latin small letter o with tilde</td>
</tr>
<tr>
<td align="right">246</td>
<td align="right">366</td>
<td align="right">F6</td>
<td align="right">11110110</td>
<td align="center">ö</td>
<td align="center">&amp;#246;</td>
<td align="left">Latin small letter o with diaeresis</td>
</tr>
<tr>
<td align="right">247</td>
<td align="right">367</td>
<td align="right">F7</td>
<td align="right">11110111</td>
<td align="center">÷</td>
<td align="center">&amp;#247;</td>
<td align="left">Division sign</td>
</tr>
<tr>
<td align="right">248</td>
<td align="right">370</td>
<td align="right">F8</td>
<td align="right">11111000</td>
<td align="center">ø</td>
<td align="center">&amp;#248;</td>
<td align="left">Latin small letter o with slash</td>
</tr>
<tr>
<td align="right">249</td>
<td align="right">371</td>
<td align="right">F9</td>
<td align="right">11111001</td>
<td align="center">ù</td>
<td align="center">&amp;#249;</td>
<td align="left">Latin small letter u with grave</td>
</tr>
<tr>
<td align="right">250</td>
<td align="right">372</td>
<td align="right">FA</td>
<td align="right">11111010</td>
<td align="center">ú</td>
<td align="center">&amp;#250;</td>
<td align="left">Latin small letter u with acute</td>
</tr>
<tr>
<td align="right">251</td>
<td align="right">373</td>
<td align="right">FB</td>
<td align="right">11111011</td>
<td align="center">û</td>
<td align="center">&amp;#251;</td>
<td align="left">Latin small letter u with circumflex</td>
</tr>
<tr>
<td align="right">252</td>
<td align="right">374</td>
<td align="right">FC</td>
<td align="right">11111100</td>
<td align="center">ü</td>
<td align="center">&amp;#252;</td>
<td align="left">Latin small letter u with diaeresis</td>
</tr>
<tr>
<td align="right">253</td>
<td align="right">375</td>
<td align="right">FD</td>
<td align="right">11111101</td>
<td align="center">ý</td>
<td align="center">&amp;#253;</td>
<td align="left">Latin small letter y with acute</td>
</tr>
<tr>
<td align="right">254</td>
<td align="right">376</td>
<td align="right">FE</td>
<td align="right">11111110</td>
<td align="center">þ</td>
<td align="center">&amp;#254;</td>
<td align="left">Latin small letter thorn</td>
</tr>
<tr>
<td align="right">255</td>
<td align="right">377</td>
<td align="right">FF</td>
<td align="right">11111111</td>
<td align="center">ÿ</td>
<td align="center">&amp;#255;</td>
<td align="left">Latin small letter y with diaeresis</td>
</tr>
</tbody></table>
<p>转载于网站：<a target="_blank" rel="noopener" href="https://tool.ip138.com/ascii_code/">传送门)</a></p>
<h2 id="6-BCD-码"><a href="#6-BCD-码" class="headerlink" title="6. BCD 码"></a>6. BCD 码</h2><ul>
<li>BCD码与二进制无关</li>
</ul>
<p>BCD码也称为二进制编码的十进制数，是将十进制数码0—9分别用四位二进制数来表示，这四位二进制数的权从左到右分别展开后为8、4、2、1，故称为8421 BCD码。 只需将十进制数的各位数字用与其对应的一组（4位）二进制数代替即可得到BCD码形式。</p>
<p>325<sub>D</sub> = 0011 0010 0101 <sub>BCD</sub> </p>
<img src="https://gitee.com/blogofxyz/blog-photo/raw/master/%E7%AC%94%E8%AE%B0&amp;%E5%BF%83%E5%BE%97/BCD%E7%A0%81.png" style="zoom:50%;">


                
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